Portable electronic device with a graphical user interface



The FIGURE is a front-side view of a portable electronic device with a graphical user interface showing our new design.

The dashed broken lines shown in the drawings illustrate portions of the portable electronic device with a graphical user interface that form no part of the claimed design. The dot-dash broken lines define the boundaries of the claim and form no part of the claimed design. 

CLAIM We claim the ornamental design for a portable electronic device with a graphical user interface, as shown and described. 